82 720 idle update

i had it running good most of the time anyway. it will be running good and i hear a clicking noise sounds like it coming from towards the glove box and when i hear it click it will start to run bad then it will click again and run good. anyone know what this is?maybe a relay or something

http://groups.msn.com/NissanDatsun720PickupOwners/z24enginemods.msnw

this is a 720 forum post it there...more traffic